Religion · Politics · 1792–1878

Pius IX — Age, Birthday & Biography

Born: 13 May 1792 · Died: 7 February 1878 · Age: 85

Longest-serving elected pope in the history of the Catholic Church

Did you know?During his long reign, he formally defined the dogma of the Immaculate Conception and presided over the First Vatican Council.

Quick facts

  • Date of birth13 May 1792
  • Date of death7 February 1878
  • Age at death85
  • Cause of deathMyocardial infarction
  • NationalityItalian
  • BirthplaceSenigallia, Italy
  • OccupationCatholic priest, diplomat, Catholic bishop

Editor's Take:

Pius IX began as a liberal pope and became the opposite. Revolution drove him from Rome in 1848. He then turned firmly against modern ideas. His council declared papal infallibility in 1870. In the same year Italian troops took Rome. That ended a thousand years of papal rule over the city. He called himself a prisoner in the Vatican. He was later beatified, though his reign remains controversial. His long papacy left the church more centralised than before.

Key Milestones

  1. 1846: Elected pope
  2. 1854: Defines the Immaculate Conception
  3. 1869: Opens the First Vatican Council
  4. 1870: Loses Rome to Italy

Pope Pius IX (Italian: Pio IX; born Giovanni Maria Battista Pietro Pellegrino Isidoro Mastai-Ferretti; 13 May 1792 – 7 February 1878) was head of the Catholic Church from 16 June 1846 until his death in February 1878.

Text from Wikipedia, licensed under CC BY-SA 4.0

Profile

Pope Pius IX: The Longest-Reigning Pope

Italian pope, born 1792

Pius IX was born in Senigallia on 13 May 1792.

He was pope for nearly 32 years.

He called the First Vatican Council.

He lost the Papal States in 1870.

Career highlights

  1. 1846Pope: elected
  2. 1848Rome: flees
  3. 1854Immaculate Conception: defined
  4. 1869Vatican I: opens
  5. 1870Rome: captured

Did you know?He is often described as the first pope to be photographed.

Age at death
85
Years since death
148

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Questions people ask

Frequently asked questions

When is Pius IX's birthday?
Pius IX's birthday is May 13. He was born on May 13, 1792 in Senigallia, Italy.
How old was Pius IX when he died?
Pius IX died on February 7, 1878, aged 85.
Who shares a birthday with Pius IX?
Famous people who share Pius IX's May 13 birthday include Alphonse Daudet, Maria Theresa of Austria, Stevie Wonder, Robert Pattinson and Ronald Ross.

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Reviewed by the Who Shares My Birthday editorial team.

Last reviewed: October 2026